The effects of silica fume and fly ash on the scaling resistance and flexural strength of pavement concretes

Küçük Resim Yok

Tarih

2011

Dergi Başlığı

Dergi ISSN

Cilt Başlığı

Yayıncı

Erişim Hakkı

info:eu-repo/semantics/closedAccess

Özet

The purpose of this study is to investigate the effects of Silica Fume (SF) and Fly Ash (FA) additives on the frost salt scaling resistance and flexural strength properties of pavement concrete. An attempt is also made to attain a more durable and higher strength concrete by a suitable combination of Ordinary Portland Cement (OPC), SF and FA. SF and FA are used as cement replacement in proportions of 0, 5, 10% and 0, 5, 10, 15% by weight respectively. Flexural strength is tested after 7, 28 and 91 days of the lime saturated water curing period. The experimental results indicate that using FA only decreases while SF only slightly increases 28-days flexural strength. On the other hand, using SF and FA together shows relatively more strength gain. Among all those tested, maximum 28 days flexural strength of 4.53 MPa is obtained for the mix proportions of 85% OPC + 10% FA and 5% SF. SF significantly decreases the amount of liquid absorption by capillary suction and has a significant effect on the scaling resistance. In addition, all the ternary mixtures showes better scaling resistance than the control mixture with 100% OPC. © 2011 Lavoisier, Paris.

Açıklama

Anahtar Kelimeler

Concrete pavement, Durability, Flexural strength, Fly ash, Frost and deicing salt resistance, Silica fume, Concrete pavement, Durability, Flexural strength, Fly ash, Frost and deicing salt resistance, Silica fume

Kaynak

Road Materials and Pavement Design

WoS Q Değeri

Q3

Scopus Q Değeri

Q1

Cilt

12

Sayı

1

Künye